Bookkeeping demand

I am thinking about setting up my own bookkeeping business in the SE1 area and would be interested from hearing from small businesses. I am particularly keen to get an idea of demand in the area for general bookkeeping (payroll, VAT, etc). I would be looking to start working evenings and weekends whilst I continue in my current job, with the aim of then building up the business. If anyone has any comments please post them or email me: jetglover@hotmail.com